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Issue 308083006: Don't push eax/rax before calling Runtime_Abort (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 6 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include <limits.h> // For LONG_MIN, LONG_MAX. 5 #include <limits.h> // For LONG_MIN, LONG_MAX.
6 6
7 #include "v8.h" 7 #include "v8.h"
8 8
9 #if V8_TARGET_ARCH_ARM 9 #if V8_TARGET_ARCH_ARM
10 10
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3768 3768
3769 // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest 3769 // For inputs < 255 (including negative) vcvt_u32_f64 with round-to-nearest
3770 // rounding mode will provide the correct result. 3770 // rounding mode will provide the correct result.
3771 vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding); 3771 vcvt_u32_f64(double_scratch.low(), input_reg, kFPSCRRounding);
3772 vmov(result_reg, double_scratch.low()); 3772 vmov(result_reg, double_scratch.low());
3773 3773
3774 bind(&done); 3774 bind(&done);
3775 } 3775 }
3776 3776
3777 3777
3778 void MacroAssembler::Throw(BailoutReason reason) {
3779 Label throw_start;
3780 bind(&throw_start);
3781 #ifdef DEBUG
3782 const char* msg = GetBailoutReason(reason);
3783 if (msg != NULL) {
3784 RecordComment("Throw message: ");
3785 RecordComment(msg);
3786 }
3787 #endif
3788
3789 mov(r0, Operand(Smi::FromInt(reason)));
3790 push(r0);
3791 // Disable stub call restrictions to always allow calls to throw.
3792 if (!has_frame_) {
3793 // We don't actually want to generate a pile of code for this, so just
3794 // claim there is a stack frame, without generating one.
3795 FrameScope scope(this, StackFrame::NONE);
3796 CallRuntime(Runtime::kHiddenThrowMessage, 1);
3797 } else {
3798 CallRuntime(Runtime::kHiddenThrowMessage, 1);
3799 }
3800 // will not return here
3801 if (is_const_pool_blocked()) {
3802 // If the calling code cares throw the exact number of
3803 // instructions generated, we insert padding here to keep the size
3804 // of the ThrowMessage macro constant.
3805 static const int kExpectedThrowMessageInstructions = 10;
3806 int throw_instructions = InstructionsGeneratedSince(&throw_start);
3807 ASSERT(throw_instructions <= kExpectedThrowMessageInstructions);
3808 while (throw_instructions++ < kExpectedThrowMessageInstructions) {
3809 nop();
3810 }
3811 }
3812 }
3813
3814
3815 void MacroAssembler::ThrowIf(Condition cc, BailoutReason reason) {
3816 Label L;
3817 b(NegateCondition(cc), &L);
3818 Throw(reason);
3819 // will not return here
3820 bind(&L);
3821 }
3822
3823
3824 void MacroAssembler::LoadInstanceDescriptors(Register map, 3778 void MacroAssembler::LoadInstanceDescriptors(Register map,
3825 Register descriptors) { 3779 Register descriptors) {
3826 ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); 3780 ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset));
3827 } 3781 }
3828 3782
3829 3783
3830 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { 3784 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
3831 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); 3785 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset));
3832 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); 3786 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
3833 } 3787 }
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4040 sub(result, result, Operand(dividend)); 3994 sub(result, result, Operand(dividend));
4041 } 3995 }
4042 if (ms.shift() > 0) mov(result, Operand(result, ASR, ms.shift())); 3996 if (ms.shift() > 0) mov(result, Operand(result, ASR, ms.shift()));
4043 add(result, result, Operand(dividend, LSR, 31)); 3997 add(result, result, Operand(dividend, LSR, 31));
4044 } 3998 }
4045 3999
4046 4000
4047 } } // namespace v8::internal 4001 } } // namespace v8::internal
4048 4002
4049 #endif // V8_TARGET_ARCH_ARM 4003 #endif // V8_TARGET_ARCH_ARM
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